# Définition Metric scale

A metric scale measures quantitative characteristics or variables. The term metric scale summarizes interval scales, ratio scales and absolute scales.

Quantitative numerical values allow for most of statistical calculations and comparisons. With metric scales, we can not only determine frequency (nominal scale) or rank (ordinal scale), but also the arithmetic mean ('average') of a set of values. But keep in mind that not all numerical values are also metric values. Postal codes, for example, are numbers but they are not metric values – it would not make sense to calculate an average of postal codes.

A simple example of a metric scale is the Celsius temperature scale. It is an interval scale. When given temperatures in °C, you can tell exactly what is warmer and what is colder, also the interval between 10°C and 20°C is equal to the interval between 30°C and 40°C. Furthermore, you can calculate an arithmetic mean, for example the average monthly temperature.

Les définitions de notre encyclopédie sont des explications simplifiées de termes. Notre but est de rendre ces définitions compréhensibles pour un large public. Par conséquent, il est possible que certaines d’entre elles ne soient pas entièrement à la hauteur des standards scientifiques.

Terme commençant par M